32 |
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33 |
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#define BRT2SCALE(l2) (int)(M_LN2*TM_BRTSCALE*(l2) + ((l2)>0 ? .5 : -.5)) |
34 |
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35 |
< |
#define HISTEP 8 /* steps in BRTSCALE for each bin */ |
35 |
> |
#define HISTEP 16 /* steps in BRTSCALE for each bin */ |
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#define MINBRT (-16*TM_BRTSCALE) /* minimum usable brightness */ |
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#define MINLUM (1.125352e-7) /* tmLuminance(MINBRT) */ |
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#define LMESUPPER (5.62) /* upper mesopic limit */ |
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#define BMESLOWER ((int)(-5.18*TM_BRTSCALE-.5)) |
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#define BMESUPPER ((int)(1.73*TM_BRTSCALE+.5)) |
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+ |
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48 |
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/* approximate scotopic lum. */ |
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#define SCO_rf 0.062 |
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#define SCO_gf 0.608 |